JP2017095213A - Elevator control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevator control system capable of more accurately performing the registration of a car call or the like.SOLUTION: An elevator control system includes: a radio terminal possessed by a passenger; a first radio communication device which is installed at a landing of a car so as to perform radio communication with the radio terminal; a second radio communication device which is installed in the car so as to perform radio communication with the radio terminal; and a control section for controlling the car of an elevator. When a situation that the first radio communication device performs the radio communication with the radio terminal further occurs after the radio terminal temporarily performs communication with the second radio communication device in a situation that the control section registers a car call on the basis of the reception of a signal from the radio terminal in the first radio communication device, the registration of the car call is performed again. Accordingly, a passenger requires no operation for depressing a car call button even when the car is fully occupied and the passenger cannot get on the elevator.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an elevator control system.

Usually, in the elevator apparatus, a car call button is installed at the elevator platform, and a destination floor registration button is installed in the car.
When a passenger uses an elevator, an up or down car call button is pressed at the landing to stop the up or down car at the elevator board. Then, after the passenger gets into the arriving car, the passenger presses the destination floor registration button in the car to instruct the destination floor.

Conventionally, there has been proposed a technique that eliminates the need for the passenger to operate a car call button or a destination floor registration button. For example, Patent Document 1 describes that an antenna is installed in an elevator hall and an elevator car, and a car call is automatically made when a passenger carrying an IC tag enters the detection area of the hall. . Further, Patent Document 1 describes that when a passenger enters a detection area in a car, registration of a destination floor registered in advance is automatically performed.
In addition, although the example which uses an IC tag is described in patent document 1, if it is a terminal which has radio | wireless communication functions, such as a smart phone, control similar to an IC tag is possible, for example.

JP-A-2005-255320

The antenna in the platform and the car communicates with the passenger's IC tag, and the destination floor control based on the communication eliminates the need for the passenger to press the car call button or the destination floor registration button. Convenience during use is improved.
However, even when the destination floor is controlled based on communication between the IC tag and the platform or the antenna in the car, the passenger may need to press a car call button at the platform. For example, when the car that has arrived is full and the passenger cannot ride in the car and the door of the full car is closed, the passenger needs to press the car call button by hand.

In other words, on the elevator control system side, the car arrives at the landing on the floor where the passenger carrying the IC tag is located by communication between the antenna in the landing and the car and the IC tag. However, although it is only necessary for passengers to be able to get into the car that has arrived, as described above, there are many situations in which the car is full and cannot be boarded.
Therefore, a conventional elevator automatic call system using an IC tag cannot be said to be a complete automatic call and cannot always be convenient for passengers.

  In addition, the conventional control using the IC tag is merely a control for pressing the car call button or the destination floor registration button, and further advanced control is desired. For example, there are door opening and closing buttons as well as destination floor registration buttons as buttons provided in the elevator car. The door opening and closing buttons are used by passengers with IC tags to get on and off the car. Even in such a case, it was necessary to operate appropriately according to the situation.

  The present invention has been made in view of these points, and an object of the present invention is to provide an elevator control system in which car calls can be registered more accurately.

In order to solve the above problems, for example, the configuration described in the claims is adopted.
The present application includes a plurality of means for solving the above-mentioned problems. For example, a wireless terminal carried by a passenger and a first wireless communication apparatus that is installed at a car landing and performs wireless communication with the wireless terminal And a second wireless communication device installed in the car and performing wireless communication with the wireless terminal, and identification data of the elevator and / or the wireless terminal are registered in advance, and the first wireless communication device and the second wireless communication device are A collation unit that collates identification data received by performing wireless communication with a wireless terminal and identification data of an elevator and / or wireless terminal registered in advance, and an identification received by the first wireless communication device at the collation unit When the data matches the pre-registered identification data, the car call is registered, and when the identification data received by the second wireless communication device matches the pre-registered identification data at the collating unit, And a control unit that performs destination floor registration set for each over data.
Then, after the wireless terminal temporarily communicates with the second wireless communication device in a situation where the control unit registers the car call based on the reception at the first wireless communication device, the first wireless communication is further performed. The apparatus is characterized in that the car call is registered again when the identification data received by the verification unit matches the identification data registered in advance by performing wireless communication with the wireless terminal.

According to the present invention, even when the passenger cannot get into the elevator car due to fullness or the like, the car call can be performed without pressing the car call button at the landing. It can be said that it is effective in that it can save time and effort.
Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.

It is the schematic block diagram which showed the example of whole structure of the elevator control system by one embodiment of this invention. It is a mimetic diagram showing an example in case a passenger calls a car from a landing according to an embodiment of the present invention. It is a mimetic diagram showing an example in case a passenger moves into a car from a landing and performs destination floor registration from the car according to an embodiment of the present invention. It is a flowchart (the 1) which shows the process example in the radio | wireless terminal by one embodiment of this invention. It is a flowchart (the 2) which shows the example of a process in the radio | wireless terminal by one embodiment of this invention. It is a flowchart which shows the example of control according to the reception level in two radio | wireless communication apparatuses by one embodiment of this invention.

Hereinafter, an embodiment of the present invention (hereinafter referred to as “this example”) will be described with reference to the accompanying drawings.
[1. System overview]
FIG. 1 is a diagram showing a schematic configuration of the elevator control system of this example.
In the system of this example, a passenger who uses the elevator possesses the wireless terminal 1. The wireless terminal 1 is a terminal that is always carried by a passenger such as a smartphone, and performs wireless communication with an access point or the like according to a communication standard such as a wireless local area network (LAN). In the case of this example, the wireless terminal 1 performs wireless communication with a first wireless communication device 2 (station) and a second wireless communication device 3 (inside the car) described later. An application program for calling the elevator is installed in the wireless terminal 1 possessed by the passenger. By executing the elevator call application program, the wireless terminal 1 registers the identification ID (elevator identification ID) of the elevator used by the passenger and the floor at which the elevator gets on and off. Each wireless terminal 1 is registered with a terminal ID, which is identification data unique to the terminal. Data such as the elevator identification ID and the terminal ID are transmitted to the first wireless communication device 2 (the landing) and the second wireless communication device 3 (in the car) during wireless communication.

That is, the system of this example includes the first wireless communication device 2 at the landing on each floor of the car of the elevator 6 and the second wireless communication device 3 in the car. Each of the wireless communication devices 2 and 3 is set so as to be able to perform wireless communication with a nearby wireless terminal 1 according to a wireless standard such as a wireless LAN.
In FIG. 1, each of the first wireless communication device 2 and the second wireless communication device 3 is shown as one unit, but in reality, the first wireless communication device 2 is prepared in the number corresponding to the number of landings in the building. The second wireless communication devices 3 are prepared as many as the number of cars. A range in which each of the wireless communication devices 2 and 3 can communicate with the wireless terminal 1 is referred to as a detection area. In the case of the first wireless communication apparatus 2 installed at the landing, the detection area is set, for example, in a range of about a radius m of the landing. In the case of the second wireless communication apparatus installed in the car, the inside of the car is set as the detection area. However, when the car door is open, the detection area of the first wireless communication device 2 extends from the landing to the inside of the car with the door open, and the detection area of the second wireless communication device 3 is the car. It extends from the inside to the platform. Such a change in the detection area is caused by a change in the reach of radio waves by opening and closing the door.

  Data received by the first wireless communication device 2 and the second wireless communication device 3 is supplied to the verification unit 4. The collation unit 4 stores an elevator identification ID and a terminal ID in advance, and the collation unit 4 performs a collation process between the ID transmitted from each wireless communication device 2 and 3 and the ID stored in advance. Done.

And as a result of the collation performed by the collation unit 4, when the elevator identification ID and the terminal ID match the IDs transmitted from the respective wireless communication devices 2 and 3, the collation unit 4 informs the elevator control unit 5 to the destination floor. Send data etc.
When the elevator controller 5 receives the destination floor data from the verification unit 4, the elevator controller 5 performs car call registration and destination floor registration based on the received destination floor data. A specific procedure for registering a car call and a destination floor will be described later.

[2. Example of elevator control using wireless terminals]
2 and 3 show an outline of the operation state of the elevator by a signal transmitted by the wireless terminal 1 possessed by the user.
As shown in FIG. 2, when the passenger P1 carrying the wireless terminal 1 enters the detection area of the first wireless communication device 2 at the elevator platform, the data received by the first wireless communication device 2 is sent to the verification unit 4. The collation process is performed in the collation unit 4. And when it matches with the data registered beforehand by the result of collation, the data of a destination floor are sent to the elevator control part 5. FIG.
Based on the data on the destination floor, the elevator controller 5 lights up the car call button 9 (the up car call button 9u or the down car call button 9d) at the landing where the first wireless communication device 2 is installed. Register the down car call. Which of the up car call button 9u and the down car call button 9d is lit depends on the destination floor.

Then, as shown in FIG. 3, based on the registered car call, when the car 8 arrives at the landing and the landing door 11 and the car door 12 open, the passenger P1 gets into the car 8. Can do.
At this time, the wireless terminal 1 possessed by the passenger P2 who has entered the car 8 communicates with the second wireless communication device 3 installed in the car 8. At this time, the data received by the second wireless communication device 3 is sent to the collation unit 4, and collation is performed by the collation unit 4. As a result of this collation, the destination floor data is sent to the elevator control unit 5 when it matches the pre-registered data.
Based on the data on the destination floor, the elevator controller 5 lights the destination floor button of the corresponding floor of the car 8 in which the second wireless communication device 3 is installed, and registers the destination floor.

  Thus, according to the elevator control system of this example, a passenger who has the wireless terminal 1 in which the destination floor is registered in advance does not perform an operation of pressing the car call button at the landing or the destination floor button in the car 8. It becomes possible to go to the destination floor. Up to this point, it is the same as the elevator control system using the wireless terminal 1 proposed in the past, but in this example, the car 8 that has arrived at the landing place is full in the situation where the car call registration is performed, and passengers When P1 cannot be picked up, the car call registration is automatically performed again. Further, when the car 8 arrives at the landing, the elevator control unit 5 appropriately sets the opening time of the doors 11 and 12 according to the communication status between the wireless terminal 1 and the wireless communication devices 2 and 3. Control. Details of processing for performing these controls will be described below.

[3. Specific processing example in wireless terminal]
4 and 5 are flowcharts showing a processing procedure executed by an application program installed in the wireless terminal 1. The “A” part shown in FIG. 4 follows the “A” part shown in FIG. 5, and the “B” part shown in FIG. 5 follows the “B” part shown in FIG.

  When the passenger P1 carrying the wireless terminal 1 enters the detection area of the first wireless communication device 2 at the elevator platform, the wireless terminal 1 receives the radio wave transmitted from the first wireless communication device 2 (step S11). ). At this time, the wireless terminal 1 executes an authentication process for connecting to the first wireless communication apparatus 2 in a state where data communication is possible. Then, the wireless terminal 1 determines whether or not the authentication process has been completed and the wireless terminal 1 has already been connected to the first wireless communication device 2 (step S12). When it is determined in step S12 that the connection has not been made, the wireless terminal 1 executes an authentication process for connecting to the first wireless communication device 2 (step S13).

  When it is determined that the connection is completed in step S12 and when the connection work is completed in step S13, the wireless terminal 1 transmits the elevator identification ID and the destination floor registration data to the first wireless communication device 2 (step S13). S14). Here, if the wireless terminal 1 has already been registered in the verification unit 4, the verification in the verification unit 4 is completed, and the destination floor registration data is sent to the elevator control unit 5. The elevator control unit 5 registers the car call by turning on the car call button 9 at the landing corresponding to the received destination floor registration data.

  By such car call registration, the car 8 arrives at the landing and the doors 11 and 12 of the landing and the car 8 are opened. At this time, the wireless terminal 1 possessed by the passenger P1 at the landing receives the radio wave transmitted from the second wireless communication device 3 installed in the car 8 (step S15). Then, the wireless terminal 1 determines whether or not the state of detecting the radio wave transmitted from the second wireless communication device 3 continues (step S16). Here, when the state of detecting the radio wave transmitted from the second wireless communication device 3 continues, this corresponds to the state where the passenger P2 has entered the car 8 as shown in FIG. 1 shifts to determination of step S21 of the flowchart of FIG.

  On the other hand, when the state of detecting the radio wave transmitted from the second wireless communication device 3 is interrupted in the determination of step S16, the wireless terminal 1 is connected to the second wireless communication device 3 in the car 8. It is determined whether the authentication process is completed and the connection is once completed (step S17). Here, when not connected, the wireless terminal 1 returns to the process of step S15.

  When it is determined in step S17 that the connection is once completed, the wireless terminal 1 returns to the process of step S11. That is, it is assumed that the passenger P1 does not get on the car 8 with the doors 11 and 12 open and continues to be in the landing when the radio waves of the second wireless communication device 3 cannot be detected. The destination floor registration process from step S11 to step S14 is performed again. Therefore, the elevator control unit 5 executes call registration again, and the call button 9 that has been turned off when the car 8 arrives is turned on again.

Next, the process shown in the flowchart of FIG. 5 will be described.
First, the wireless terminal 1 determines whether or not the authentication process with the second wireless communication device 3 in the car 8 has been completed and the connection has been completed (step S21). When it is determined in step S21 that the connection has not been made, the wireless terminal 1 executes an authentication process for connecting to the second wireless communication device 3 (step S22).

When it is determined that the connection is completed in step S21 and when the connection work is completed in step S22, the wireless terminal 1 determines whether or not the signal radio wave intensity received from the second wireless communication apparatus 3 is equal to or higher than the reference level. (Step S23). Here, when the signal radio wave intensity received from the second wireless communication apparatus 3 is not equal to or higher than the reference level, the wireless terminal 1 proceeds to the process of step S15 in the flowchart of FIG.
In step S23, when it is determined that the signal radio wave intensity received from the second radio communication apparatus 3 is equal to or higher than the reference level, the radio terminal 1 determines that the signal radio wave intensity received from the first radio communication apparatus 2 is less than the reference level. Whether or not (step S24). Here, when the signal radio field intensity received from the first wireless communication apparatus 2 is not below the reference level, the wireless terminal 1 proceeds to the process of step S15 in the flowchart of FIG.

  If it is determined in step S24 that the signal radio wave intensity received from the first wireless communication device 2 is below the reference level, a situation in which the passenger P2 gets into the car 8 is assumed as shown in FIG. Transmits the elevator identification ID and the destination floor registration data to the second wireless communication device 3 (step S25). Here, if the wireless terminal 1 has already been registered in the verification unit 4, the verification in the verification unit 4 is completed, and the destination floor registration data is sent to the elevator control unit 5. And the elevator control part 5 lights the destination floor button of the floor instruct | indicated based on the received destination floor registration data, and performs destination floor registration. By performing the control process as described above, the elevator using the wireless terminal 1 is controlled, and the passenger carrying the wireless terminal 1 does not need to perform an operation of pressing a car call button or a destination floor button.

In addition, when the condition of step S23 is not satisfied and when the condition of step S24 is not satisfied, when the process proceeds to step S15 in the flowchart of FIG. 4, the passenger P1 is not in the car 8. In such a situation, the wireless terminal 1 performs the processing from step S11 again after the determination in steps S16 and S17, and the elevator control unit 5 transmits the destination floor registration data and the like in step S14. Car call registration will be executed again.
Therefore, according to the elevator control system of this example, when the car 8 arrives at the landing as shown in FIG. 3 and does not get in the car 8, the car call registration is performed again, and the passenger P1 manually moves the car. There is no need to press the call button 9. That is, even if the car 8 that has arrived at the landing place in the situation where the car call registration has been performed and the car 8 is not full, the passenger P1 does not need to press the car call button 9 again, and the passenger P1 at the landing place It is only necessary to wait for the car 8 to arrive again.

[4. Example of processing to control door opening time]
In the elevator control system of the present example, in addition to the process of re-registering the car 8 as described above, when the passenger enters the car 8 that has arrived at the landing after performing call registration, the doors 11 and 12 are opened. It is possible to control the time.
The flowchart of FIG. 6 shows an example of processing when the elevator control unit 5 performs processing for controlling the opening time of the doors 11 and 12.

  First, the elevator control unit 5 received radio waves from the same wireless terminal 1 in both the first wireless communication device 2 installed in the landing and the second wireless communication device 3 installed in the car 8. It is determined whether the situation is present (step S31). Here, when the signals from the same wireless terminal 1 cannot be received from the two wireless communication devices 2 and 3, the control waits as it is, and the elevator control unit 5 repeatedly executes the determination in step S31.

  In step S31, when the two wireless communication devices 2 and 3 receive a signal from the same wireless terminal 1, the elevator control unit 5 determines that the reception level of the radio wave in each of the wireless communication devices 2 and 3 is in advance. It is determined whether or not the set threshold value is exceeded (step S32). For example, the threshold value is set to a value for determining whether or not a passenger is in the vicinity of the doors 11 and 12 when the doors 11 and 12 are opened as shown in FIG. Here, if any one of the reception levels in the wireless communication devices 2 and 3 is not equal to or higher than the preset threshold value, the elevator control unit 5 returns to the determination in step S31. For example, when the passenger is in a place away from the landing door 11, the reception level of the second wireless communication device 3 becomes equal to or lower than the threshold value, and the elevator control unit 5 returns to the determination in step S <b> 31.

  When the reception levels of the radio waves at the two wireless communication devices 2 and 3 are both higher than the threshold and relatively strong in step S32, the elevator control unit 5 sets the reception level priority mode (step S33). ). When this reception level priority mode is set, the elevator control unit 5 compares the reception level at the first wireless communication device 2 with the reception level at the second wireless communication device 3 (step S34).

  If the reception level of the second wireless communication device 3 in the car is greater than the reception level of the first wireless communication device 2 at the landing in the comparison in step S34, the elevator control unit 5 In response, a door close command is output. The car 8 that has received this door closing command closes the doors 11 and 12 (step S35). However, at this time, if there is an operation of a door button in the car 8 or detection of getting on and off by a sensor attached to the doors 11 and 12, priority is given to the operation and detection on the car 8 side. However, the operation of closing the doors 11 and 12 is not performed. And when the doors 11 and 12 will be in a closed state by step S35, the elevator control part 5 complete | finishes reception level priority mode (step S36).

  If the reception level of the first wireless communication device 2 at the landing is higher than the reception level of the second wireless communication device 3 in the car in the comparison at step S34, the elevator controller 5 It is determined whether or not a certain time has elapsed since 11, 12 arrived at the landing and the door was opened (step S37). Here, a relatively long time of about 30 seconds is set as the fixed time to prevent the door opening from continuing longer than necessary in the reception level priority mode. When it is determined in step S37 that the predetermined time has elapsed, the elevator controller 5 moves to the process of step S36, ends the reception level priority mode, and returns to the normal door control mode.

  When it is determined in step S37 that the predetermined time has not elapsed, the elevator controller 5 outputs a door open maintenance command to the car 8 (step S38). The car 8 that has received this door open maintenance command maintains the open state of the doors 11 and 12. After outputting the door open maintenance command in step S38, the elevator controller 5 returns to the comparison process in step S34.

As shown in the flowchart of FIG. 6, by setting the reception level priority mode, in the situation where the passenger carrying the wireless terminal 1 is at the landing near the doors 11 and 12 that are opened, the doors 11 and 12 are used. Open maintenance command is output, and the doors 11 and 12 are maintained in the open state. Therefore, while the passenger carrying the wireless terminal 1 gets in, the doors 11 and 12 do not close, and other passengers press the door open button provided on the car 8 to maintain the open state. It becomes unnecessary. When the passenger gets into the car 8, the reception level of the second wireless communication device 3 is higher than the reception level of the first wireless communication device 2, and the process proceeds from step S34 to step S35. The doors 11 and 12 are immediately closed.
Therefore, according to the elevator control system of this example, when the passenger carrying the wireless terminal 1 gets into the car 8, the doors 11 and 12 can be appropriately controlled according to the passenger's boarding situation.

  In the flowchart of FIG. 6, the control process when the passenger gets into the car 8 from the landing has been described. On the other hand, for example, when the car 8 arrives at the registered destination floor and the doors 11 and 12 are opened, the reception level of the first wireless communication device 2 at the landing on the arrival floor and the car 8 The open state of the doors 11 and 12 may be controlled by comparing the reception levels of the second wireless communication device 3. By controlling in this way, the opening / closing control of the doors 11 and 12 can be appropriately controlled even when the passenger gets out of the car 8.

[Modification]
In addition, as a wireless terminal 1 carried by a passenger, a smartphone is used as an example. For example, a wireless terminal such as a so-called non-contact IC card that performs near field communication called NFC (Near Field Communication) is used. May be used.

  Further, in the above-described embodiment, when the passenger who has the wireless terminal 1 is full and does not get on the car 8, the wireless terminal 1 described with reference to the flowcharts of FIGS. The elevator control unit 5 performs the processing based on the above. On the other hand, the elevator control unit 5 or the verification unit 4 detects whether the passenger carrying the wireless terminal 1 has got on the car 8 that has arrived at the landing, and is in the landing without getting on the car 8 At this time, the same control may be performed. In this case, the detection process as to whether or not the passenger has entered the car 8 can be performed by comparing the reception levels of the two wireless communication apparatuses 2 and 3 as described in the flowchart of FIG.

  Moreover, although the collation part 4 demonstrated the process which collates elevator identification ID which identifies an elevator in embodiment mentioned above, you may make it collate terminal ID which identifies the radio | wireless terminal 1. FIG. Or the collation part 4 may collate both elevator identification ID and terminal ID.

  Further, the present invention is not limited to the above-described embodiments, and includes various modifications. For example, the above-described embodiments have been described in detail in order to easily understand the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of an embodiment can be replaced with the configuration of another embodiment or modification, and the configuration of another embodiment can be replaced with another embodiment or modification. It is also possible to replace the example configuration. In addition, it is possible to add, delete, and replace other configurations for a part of the configuration of the embodiment.

Each of the above-described configurations, functions, processing units, processing means, and the like may be realized by hardware by designing a part or all of them with, for example, an integrated circuit. Each of the above-described configurations, functions, and the like may be realized by software by interpreting and executing a program that realizes each function by the processor. Information such as programs, tables, and files for realizing each function can be stored in a recording device such as a memory, a hard disk, an SSD (Solid State Drive), or a recording medium such as an IC card, an SD card, or a DVD.
Further, the control lines and information lines in FIG. 1 and the like indicate those that are considered necessary for the explanation, and not all the control lines and information lines on the product are necessarily shown. Actually, it may be considered that almost all the components are connected to each other.

  DESCRIPTION OF SYMBOLS 1 ... Wireless terminal, 2 ... 1st wireless communication apparatus, 3 ... 2nd wireless communication apparatus, 4 ... Collation part, 5 ... Elevator control part, 6 ... Elevator, 8 ... Car, 9 ... Car call button, 9u ... Up car call button, 9d ... Down car call button, 11, 12 ... Door, P1, P2 ... Passenger

Claims (5)

A wireless terminal carried by the passenger;
A first wireless communication device installed at a car landing and performing wireless communication with the wireless terminal;
A second wireless communication device installed in the car and performing wireless communication with the wireless terminal;
The identification data of the elevator and / or the wireless terminal is registered in advance, and the identification data received by the first wireless communication device and the second wireless communication device performing wireless communication with the wireless terminal are registered in advance. A collation unit for collating identification data of the elevator and / or the wireless terminal;
In the verification unit, when the identification data received by the first wireless communication device matches the previously registered identification data, a car call is registered,
A controller that performs destination floor registration set for each identification data when the identification data received by the second wireless communication device matches the previously registered identification data in the verification unit;
After the wireless terminal has temporarily communicated with the second wireless communication device in a situation where the control unit has registered the car call based on reception by the first wireless communication device, the first wireless communication device further includes By performing wireless communication with the wireless terminal by one wireless communication device, the car call registration is performed again when the received identification data matches the pre-registered identification data in the verification unit. Elevator control system. The registration of the car call is performed again after the wireless terminal performs wireless communication with the second wireless communication device in a predetermined state and then performs wireless communication with the first wireless communication device again in a predetermined state. The elevator control system according to claim 1, wherein when the control is performed, the control unit performs the control based on data transmitted from the wireless terminal. The elevator control system according to claim 2, wherein the predetermined state is a state in which the wireless terminal is connected so as to be able to transmit data through wireless communication with the first or second wireless communication device. When the first wireless communication device and the second wireless communication device simultaneously receive a signal transmitted from the wireless terminal, the control unit receives a reception level at the first wireless communication device; The elevator control system according to claim 1, wherein door opening and closing of the car are controlled based on a comparison with a reception level at the second wireless communication device. The control unit instructs the car to keep the door open when the reception level at the first wireless communication device is greater than or substantially equal to the reception level at the second wireless communication device. When the reception level at the first wireless communication device is higher than the reception level at the first wireless communication device, the reception level at the second wireless communication device is higher than the reception level at the first wireless communication device. The elevator control system according to claim 4, wherein a command for closing the car door is output.

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